I had a pair of 2x12 cabs under my bench the last 20 years. They were my main test speakers. They were out of the way and not taking up space I needed, I could hear them just fine. I brought the wires from them up to a small patch panel on my bench riser. My dummy load was under there as well, and I brought those wires up to the panel as well.
In another shop I had an old West 4x12 cab - loaded with SROs of all things - sitting beside me at the bench. I used it as a table for my tool box.